This simple lab activity was designed for physics, chemistry, physical science, and life science students. The purpose of this lab is to estimate the number of drops of water in a milliliter. This information is quite useful to some scientists. For instance, if a chemist needs to add a small amount of water in an experiment, for example 0.2 ml or 0.7 ml, then with the knowledge gain in this lab, the chemist will know to an acceptable degree of precision the number of drops of water needed to ha